'Whitey' Bulger Guilty Of 11 Killings04:18

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This June 23, 2011 file booking photo provided by the U.S. Marshals Service shows James "Whitey" Bulger, who was captured in June 2011 in Santa Monica, Calif., with his longtime girlfriend Catherine Greig.

James "Whitey" Bulger, the feared Boston mob boss who became one of the nation's most-wanted fugitives, was convicted Monday in a string of 11 killings and other gangland crimes, many of them committed while he was said to be an FBI informant. (Read the full verdict here)

Bulger, 83, showed no reaction upon hearing the verdict, which brought to a close a case that not only transfixed the city with its grisly violence but exposed corruption inside the Boston FBI and an overly cozy relationship between the bureau and its underworld snitches.

Bulger was charged primarily with racketeering, a catchall offense that listed 33 criminal acts - among them, 19 murders that he allegedly helped orchestrate or carried out himself during the 1970s and '80s while he led the Winter Hill Gang, Boston's ruthless Irish mob. The racketeering charge also included acts of extortion, money-laundering and drug dealing.

The jury had to find he committed only two of those acts to convict him of racketeering. After 4 days of deliberations, it decided he took part in 11 of those murders, along with nearly all of the other crimes.

Bulger could get life in prison. But given his age, even a modest term could amount to a life sentence for the slightly stooped, white-bearded Bulger.